To make the syrup, heat a saucepan over medium heat. Stir in the water and sugar. Once the sugar dissolves, stir in the blueberries. Bring the mixture to a light boil and continue to cook for about 5-7 minutes or until most of the blueberries have broken down, stirring every 2 minutes or so.

Step 2

Remove the pan from the heat. Pour the syrup through a fine mesh sieve. Discard the solids. Set the syrup aside and let the syrup cool completely.

Step 3

In a pitcher, stir together the lemon juice, water, and the blueberry syrup. Chill. Garnish with fresh blueberries and lemon slices if desired.